I'm using one on the Fire Bird Styled RDA (SKU 4442100). Will check for others.

As far as draining goes, I don't tend to mind if the pin is a bit long and leaves a bit of juice on the bottom of the deck. Just that much longer that you don't have to squonk. Of course, it might be a leaking issue in some instances but given it's an RDA I think they'd be rare.